Is it possible to record the distance between stimuli and where participant clicked?

Comments

• sebastiaan

  October 2020

  Hi @SoSo ,

  To change the position of the pole on each trial, you need to specify its position, right? So there will probably be two variables, say pole_x and pole_y , that indicate the center of the pole. And you will have two variables, cursor_x and cursor_y , that indicate where the participant clicked. And that's all you need!

  You can use this to determine afterwards, for example in LibreOffice Calc, what the distance between the pole and the click was (using Pythagoras). Or if you want to be fancy, you can do it in the run phase of a simple inline_script after the response has been collected, like so:

  var.distance_to_pole = xy_distance(var.pole_x, var.pole_y, var.cursor_x, var.cursor_y)
  

  — Sebastiaan

  
  
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• SoSo

  October 2020

  Hello @sebastiaan

  Yes! That's what I was looking to do.

  So, you mean I can assign the pole at different coordinates (pole_x, pole_y) for every trial on sketchpad? So the (pole_x, pole_y) value is already defined even before participant respond. I am not super familiar with how to write inline script so I will have to educate myself and try it out.

  On another note, I have another question. I hope you don't mind me asking on the same thread. First image shows the experiment that is running and the second image shows the inline script ("process_team").

  1) Why am I able to write numbers but not letters on the experimental screen? How do I edit the script so that it accepts letters?

  2) Why am I able to write numbers that were not specified on the script? On the keyboard response, I did allow all numbers to be accepted (0 to 9) but on the script I only included 0,1,2,3,4,5. So why is it still being shown on experimental screen although not specified on script?

  

  

  Note, this is the inline script that is inserted before the block ("constant_4"). And the inline script above is called "process_team".

  

  Cheers, So So
• eduard

  November 2020

  Hi So So,

  So, you mean I can assign the pole at different coordinates (pole_x, pole_y) for every trial on sketchpad? So the (pole_x, pole_y) value is already defined even before participant respond.

  If you want the pole to have a different position on every trial, then yes, you can make it variable. The way to do so is what Sebastiaan described, that is, having 2 variables that code the x and y coordinate of the pole. In the beginner's tutorial step 6, it is explained how to use variables in sketchpads. Let us know if this is not enough to clear things up.

  I am not super familiar with how to write inline script so I will have to educate myself and try it out.

  Always a good idea :)

  On another note, I have another question. I hope you don't mind me asking on the same thread.

  Can you share the experiment here? That will make it easier to find out what is happening in your code.

  Best,

  Eduard

  
• SoSo

  November 2020

  Dear Eduard,

  I have attached only the part where I was having trouble. Basically, I want to ask "What is your favourite football team?" and to accept answers in letters. And I would like to ask the question at the end of the experiment.

  favteam work on.osexp

  
  

  Thank you so much!

  So So
• lvanderlinden

  November 2020

  Hi Soso,

  
  

  I removed the parts of your script that dealt with specifying which input to accept, and that works (see attached). I don't think you need to implement any restrictions.

  
  

  Did you solve the other issue, that is, did you manage to make the location of the pole variable?

  
  

  Cheers,

  
  

  Lotje

  
  

  
  

  
  

  6586.osexp

  
  

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